2 .6 Refrigeration connections
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This appliance uses refrigerant R410A .
Comply with the legislation for handling refrigerants.
2 .6 .1 Rules and precautions
• After every intervention on the refrigeration circuit and
before final connection, take care to replace the plugs in
order to avoid any pollution from the refrigeration circuit.
•
Minimum necessary tools
- Set of manometers (
Manifold
) with hoses exclusively
reserved for HFCs (Hydrofluorocarbons).
- Vacuum gauge whith isolation valves.
- Vacuum pump specially for HFCs (use of a traditional
vacuum pump is authorized if, and only if, it is fitted
with a non-return valve on the suction side).
- Flaring tool.
- Pipe-cutter.
- Deburring tool.
- Wrenches.
- Refrigerant gas leak detector certified (sensitivity 5g/year).
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Provision on using tools that have been in
contact with HCFCs (R22 for example) or CFCs.
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The manufacturer declines any liability with
regard to the guarantee if the above instructions
are not observed .
•
Flared connections
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Lubrication with mineral oil (for R12, R22)
is forbidden .
- Only lubricate with polyolester refrigeration oil (POE).
If POE is not available, fit without lubrication.
Coat the flared surface
with
POE refrigeration oil .
Do not use mineral oil .
• Brazing on the refrigeration circuit (if necessary)
- Silver brazing (40% minimum recommended).
- Brazing only under dry nitrogen internal flux.
• To eliminate any filings in the pipes, use dry nitrogen
to avoid introducing any humidity that may adversely
affect the appliances operation. In general, take every
precaution to avoid humidity penetrating into the
appliance.
• Proceed to insulate the "Gas" and "Liquid" pipes to
avoid any condensation. Use pipe insulators resistant
to temperatures over 90°C. In addition if the humidity
level in areas where the refrigeration pipes are
installed is expected to exceed 70%, protect the pipes
with pipe insulators. Use an insulating material thicker
than 15mm if the humidity level is 70~80%, and an
insulating material thicker than 20mm if the humidity
exceeds 80%. If the recommended thicknesses are
not observed under the conditions described above,
condensation will form on the surface of the insulation
material. Lastly, take care to use pipe insulators
whose thermal conductivity is 0.045 W/mK or less
when the temperature is 20°C. The insulation must be
impermeable to resist the passage of steam during the
defrosting cycles (fibreglass wool is prohibited).
Installation and operating manual "1572 - EN"
Heat pump air/water split 2 services alféa excellia duo
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